the heart and it's parts

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Across
  1. 5. The biggest Artery
  2. 7. The smallest blood vessel know
  3. 8. The ‘doors’ of the heart, the things that allow blood to flow thru the chambers by opening and closing
  4. 9. cardiac tissue that separates the two ventricles in a triangular shape
  5. 11. A liquid filled hole in the heart
Down
  1. 1. Carries blood that is oxygenated from the hart to all parts of the body
  2. 2. A large blood vessel that carries blood from other parts of the body to the heart (hint: it has to parts)
  3. 3. One of two upper chambers in the heart
  4. 4. A device that is placed into the heart to make it beat properly
  5. 6. Muscle that the heart is made out of
  6. 10. A tube that carries blood back towards the heart